Merge pull request #53 from vvidal/master

AIF data structure : first release with an obj reader and a test
small update and fix : Gharial now ok with vs2012
fix vs2010 warnings in AIF/AIFMesh.h
fix const_iterator in AIFFace.cxx and AIFVertex.cxx for vs2008
Merge branch 'master' of github.com:MEPP-team/Gharial
Add a mechanism to generate unique Id for each filter in the BaseFilter thanks to the use of the constructor with zero argument by derived classes.

Add 2 methods to the pipeline : Get and IsPresent